Sonadow fluff
Sonic and Shadow where always good friends, but continuously fighting. Sonic found Shadow boring and antisocial. Shadow found Sonic irritating and irresponsible. They both disliked each other. It was very odd, that once every two weeks Shadow and Sonic would mysteriously disappear. And with them take a picnic basket, a sleeping bag, and a pair of handcuffs.
Amy got so curious one day, she followed them. She came back crying. Everyone began to question her but all she did was cry.
So they watched themselves. Let's just say Shadow got a bit fatter and avoided all of them.